MadSci Network: Physics |
The following quote comes from Discover Magazine's website. It was written by Professor Mario Affatigato, a physics professor at Coe College. It seems to be a direct contradiction to what is stated on the MadSci Network, most notably the answer to question # 876881858.Ph. After reading through these several times, I am confused about the relationship between light and glass. "Light can interact with matter in a variety of ways. For instance, the electrons in a material can absorb photons, or particles of light, and jump energy levels. If the absorption is great enough, no light is transmitted and the object appears opaque. Light can also be scattered by small, crystalline particles in a material. Such scattering makes ceramic tiles look opaque. "Glass is not a crystal but an amorphous material in which the molecules are arranged without any long-range order. Because glass contains no large grains it does not scatter light the way a ceramic does; visible light does not contain enough energy for glass's tightly bound electrons to absorb the photons and jump levels. As a result, glass is both colorless and transparent." This seems to be saying that the absorbtion of light PREVENTS a medium from transmitting light, while the answer to question # 876881858.Ph seems to be saying that glass transmits light BECAUSE it absorbs and emits photons. Any explanation would be appreciated.
Re: Are photons absorbed and re-emitted by glass?
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